Home / 13,406.85-18,459.39-11,386.05

Finding the Fourth Proportional to 13,406.85, 18,459.39 and 11,386.05

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Solution

The fourth proportional to 13,406.85, 18,459.39 and 11,386.05 is: 15,677.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,406.85 : 18,459.39 = 11,386.05 : x
  2. Step 2: Convert to fraction form
    13,406.85/18,459.39 = 11,386.05/x
  3. Step 3: Cross multiply
    13,406.85x = 18,459.39 × 11,386.05
  4. Step 4: Simplify right side
    13,406.85x = 210,179,614.82
  5. Step 5: Solve for x
    x = 210,179,614.82/13,406.85
  6. Step 6: Final answer
    x = 15,677.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.